n. 1. One who, or that which, plumps or swells out something else; hence, something carried in the mouth to distend the cheeks. [ 1913 Webster ] 2. (English Elections) A vote given to one candidate only, when two or more are to be elected, thus giving him the advantage over the others. A person who gives his vote thus is said to plump, or to plump his vote. [ 1913 Webster ] 3. A voter who plumps his vote. [ Eng. ] [ 1913 Webster ] 4. A downright, unqualified lie. [ Colloq. or Low ] [ 1913 Webster ] | 